Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2020

Marketable Securities and Held-to-Maturity Debt Securities

Schedule of marketable securities

(Millions)	March 31, 2020		December 31, 2019
Commercial paper	$	194	$	85
Certificates of deposit/time deposits		6		10
U.S. municipal securities		24		3
Current marketable securities	$	224	$	98
U.S. municipal securities	$	34	$	43
Non-current marketable securities	$	34	$	43
Total marketable securities	$	258	$	141

Marketable securities by contractual maturity

(Millions)	March 31, 2020
Due in one year or less	$	224
Due after one year through five years		14
Due after five years through ten years		20
Total marketable securities	$	258